Bazzite unstable-45.20261113 updates Mesa 26.2.6, Gamescope 3.17, and Linux 7.3.4 kernel

Bazzite, the Universal Blue-based Fedora remix targeting Steam Deck and handheld gaming PCs, has published unstable-45.20261113 with substantial component updates. The release moves to Mesa 26.2.6-2, Gamescope 3.17.0, and a new 7.3.4-ogc3.1 kernel alongside an Nvidia LTS variant at 6.18.60-ogc1.2. Other notable updates include MangoHUD 0.8.4, UMU Launcher 1.4.4 for Proton management, and PowerStation 0.10.2 for power profiling. The snapshot also carries four targeted fixes: ISO installer /mnt directory handling, Btrfs dynamic reclaim enablement, AYANEO 3 controller reconnection speedup after module refit, and CEC runtime bounding to prevent resume failures.

This unstable channel release serves as a testing ground for components that will eventually reach Bazzite's stable branch. The update touches all three image variants—Deck, KDE, and GNOME—with variant-specific package refreshes including Xvfb and Xephyr updates for nested display support. Users can rebase via the bazzite-rollback-helper utility.

Graphics stack and handheld-specific changes

• Mesa 26.2.6-2: Updated graphics driver stack providing RADV and other open-source GPU drivers for Vulkan and OpenGL workloads on AMD and Intel hardware.
• Gamescope 3.17.0 and Gamescope Session: New compositor version with matching session package from October 2026 git snapshot, handling display output for handheld and TV gaming modes.
• Kernel 7.3.4-ogc3.1 / 6.18.60-ogc1.2 (Nvidia LTS): Custom Bazzite kernel branches with OGC patches; mainline advances to 7.3.x series while Nvidia LTS users remain on 6.18.x for driver compatibility.
• AYANEO 3 controller fix: Deck-specific patch (dd7a816) accelerates controller reconnection timing following module refit operations on this handheld device.
• Btrfs dynamic reclaims: Filesystem-level change (06732aa) enabling automatic space reclamation behavior in the Btrfs root layout used by Bazzite's image-based atomic updates.

Why it matters

Bazzite's rapid iteration on Mesa, Gamescope, and kernel versions provides an early testing environment for graphics and input stack improvements that feed into broader Fedora and Fedora Silverblue gaming spins. The inclusion of UMU Launcher 1.4.4 and updated sched_ext schedulers keeps the distribution aligned with Valve's SteamOS tooling and modern Linux gaming performance tuning, while the AYANEO 3-specific fix demonstrates continued investment in non-Valve handheld hardware support within the open-source gaming ecosystem.